选择运算

设计了用直方图估计选择运算与连接运算结果大小的算法，进行了相应的实验，并提出下一步工作的思路。

Algorithms of estimating the sizes of query results of selection operations and join operations are designed , and corresponding experiments are implemented , and a clue of further research is given .

实验结果表明，对于带有选择运算的查询，SJQA算法的优化效益与查询的选择因子大小成近似反比关系，因此它对该类查询的优化效果是十分明显的。

Experimental results show that the optimizing benefits from SJQA will increase as the selective factors of the query are smaller , and its optimizing effect on this kind of query is quite obvious .

在保证频谱细化要求下，此改进算法可根据参数选择运算量最小的滤波器带宽和选抽比。

The improved algorithm selects the band width and down sampling ratio with the shortest computation time in accordance with the parameters .

同时，运用数学方法对大学科技园专业项目的战略重点进行了选择运算，并对其方法、原则和注意事项作以阐述。

Meanwhile , mathematical methods have been respectively used to test the strategic points in University Science Park project , with an illustration on its methods , principles and precautions it requires .

改进遗传算法采用了顶端增强算子进行选择运算以强化其收敛性，并利用动态进化因子来进行交叉算子和变异算子的选择以防止早熟。

The improved genetic algorithm is aimed at traveling salesman problem , which adopts top proliferation operator to realize select operator for enhancing convergence and dynamic evolution gene to select crossing operator or mutation operators for avoiding its premature .

基于数据流的组件组合方法：介绍了基于数据流的组件组合模型，并给出了CCS组件的四种组合运算方法：顺序组合运算、使用组合运算、选择组合运算、协作组合运算。

Describes the method of components combination based on Data Stream , and gives 4 kinds of combination method : the Sequential Combination , the Using Combination , the Choosing Combination , the Cooperation Combination . ( 4 ) The reusing method based on source code .

指令选择和运算过程就这样相继地进行。

The process of instruction selection and operation thus proceeds sequentially .

施工机械管理信息系统土方施工机械选择匹配运算模型的应用

The Application of Earthwork Construction Machinery Choosing Matched Calculating Model

在该决策系统中，从企业战略角度筛选备选项目，缩小备选项目集，以提高项目组合选择决策运算和求解效率。

In this decision-making system , we screen chosen projects according to corporate strategy , which can narrow the set of alternative projects and improve efficiencies of project portfolio selection and computing .

分析集成运算放大电路运算误差的表现形式，给出了如何恰当选择集成运算放大器外围元件参数，减小运算误差的合理途径和具体原则。

WT5BZ ] Author analyzes the expression form of error of integrated operational amplifier circuit , and gives the correct means and specific principle by which the element parameters of peripheral of integrated operational amplifier are selected properly and error of operation are reduced . [ WT5HZ ]

在这些心算步骤中，每个时刻只有一些数字被特殊地选择用于加法运算的被加数，而其他的数字则仅仅保存在工作记忆中并不用于当前操作。

During these steps , some digits are selected for specific roles ( e.g. , first addend ) in the addition operation , while the others are held in working memory , but not used in the current operation .

同时，文中提出的全列举与自动选择成为DNA代数运算工作的基础思想。

At the same time , " entirely enumeration and automatic selection " in this paper became the basic idea of Algebra DNA-based Computation .

文中分析了各参考帧在运动估计中的作用，提出一种快速多参考帧选择算法以降低运算复杂度。

In this paper , a fast multiple reference frame selection algorithm is proposed to reduce the computational complexity of MRFME .

该算法引入优先函数概念，将传统的匹配选择转化成布尔运算，“并行”地搜索匹配集合。

By using symbolic manipulations , this algorithm introduces the priority function applied to a " parallel " search for the set of matching .

讨论了物理实验基础知识中一次测量的误差估计、测量仪器精度的选择和有效数字运算等问题，并以实例予以说明。

The problem of error estimate in the primary measurement , the selection of measuring instrument accuracy and the calculation of the effective data are discussed and explained with examples .

对比几种常用的端点检测方法，并选择效果较好利于运算的短时能量法进行端点检测，识别出信号段和噪声段，并提取信号段。

Compare several commonly used endpoint detection methods , select the better method for computing with better returning result , short-term energy method , identify the segments of the signal and noise , and extract the signal segments . 3 .

你要么选择软件质量，要么是选择指针运算，但是你不能两者同时拥有。

" You can either have software quality or you can have pointer arithmetic , but you cannot have both at the same time . "( Bertrand Meyer )